大叶桉木材乙酰化改性性能研究  

Study on the Modification of Properties of Acetylated Eucalyptus robusta

作　　者：覃引鸾[1] 董友明 Qin Yin-luan;Dong You-ming(Guangxi Eco-engineering Vocational and Technical College,Liuzhou,Guangxi 545004,China;Nanjing Forestry University,Nanjing,Jiangsu 210037,China)

机构地区：[1]广西生态工程职业技术学院,广西柳州545004 [2]南京林业大学,江苏南京210037

出　　处：《广西农学报》2022年第3期63-68,共6页Journal of Guangxi Agriculture

基　　金：2021年度广西高校中青年教师科研基础能力提升项目“透明桉木制备及其性能研究”(项目编号:2021KY1225)。

摘　　要：【目的】为提高桉木利用率,采用乙酰化处理对桉木进行改性。【方法】采用乙酸酐在不同温度下处理桉木心材、边材不同时间,并测定乙酰化桉木性能,研究改性材性能。【结果】结果显示,在相同温度下,桉木增重率随处理时间的增加而增加,最高可达12.45%。当桉木增重率为11.31%时,抗胀缩率(ASE)达73.57%。改性后桉木的尺寸稳定性提高,吸水率降低了39.98%。【结论】乙酰化能有效改善桉木的物理性能,赋予桉木良好的尺寸稳定性。【Objective】In order to improve the utilization rate of Eucalyptus robusta,acetylation treatment was applied to modify Eucalyptus robusta.【Method】The heartwood and edgewood of Eucalyptus robusta were treated with acetic anhydride at different temperatures for different times,and the properties of acetylated eucalyptus were measured to study the properties of modified wood.【Result】The results showed that under the same temperature,Eucalyptus robusta weight percent gain increased with the increase of processing time,up to 12.45%.When the weight percent gain of eucalyptus robusta was 11.31%,the antiswelling efficiency(ASE)reached 73.57%.After modification,the dimensional stability of Eucalyptus robusta was improved,and the water absorption of acetylated Eucalyptus decreased by 39.98%.【Conclusion】Acetylation can effectively improve the physical properties of Eucalyptus robusta,giving eucalyptus good dimensional stability.

关 键 词：桉木 乙酰化 增重率 抗胀缩率 

分 类 号：S792.39[农业科学—林木遗传育种]